cerebrum vs cerebellum

Where does the key lay to distinguish these two words?

It relates to a word in this phrase:

From the central committee down to the cell... which one?

haha this is exactly where Chongqing city is doing now. So my study is full of fun, like many others I spent too much time to follow the coverage of Bo-Wang event. Let me forget about Bo Wang instead my own Bo Wang, make it as loudly as the singing in the mountain city, as vehemently as Wang's electrical club, as widely as to disturb the world.